Homotropylium complexes

Oyclooctatetraene Mo(00)3 reacts with HOI to form a homotropylium ion complex ... 

This method allows generation and comparison of free homotropylium cations, e.g. 24, with the corresponding bicyclo[5.1.0]octadienylium-tricarbonyliron complexes, e.g. 25. ... 

Cyclo-octa-1,3,5-triene is conveniently stored as its SO2 adduct mild heating regenerates the triene. 9-Thiabicyclo[4,2,l]nona-2,4,7-triene 9,9-dioxide and 9-thiabarbaralane 9,9-dioxide both react with antimony pentafluoride in sulphur dioxide at — 50°C to give the cm/o-homotropylium-8-sulphinate complex (241 ... 

Details of the previously reported synthesis and reactions of the bridged 2,7-dihydrothiepin (12) and its 5-oxide have been published. The corresponding sulphone and its homologues have been converted into homotropylium sulphinate complexes. ... 

The molybdenum compound readily adds carbon monoxide at room temperature and atmospheric pressure forming the tetracarbonyl C8HsMo(CO)4 in which the C8Hs ring is thought to have the boat form [39]. Treatment of C8H8Mo(CO)3 or C8H8Mo(CO)4 with adds causes protonation and the homotropylium molybdenum tricarbonyl cation, 6.15, is formed [40]. In this complex the hydrocarbon is a 7-electron... 

---